Test/Review of Vapcell IMR18350 700mAh (Purple)

[HKJ]

Vapcell IMR18350 700mAh (Purple)



Official specifications:

• Product: Vacell 18350 700mAh
• Model: IMR 18350
• Size: 18.1*34.6mm
• Nominal voltage: 3.6V
• Charge voltage: 4.2V
• Typical Capacity: 700mAh (0.2C discharge)
• Min capacity: 650mAh (0.2C discharge)
• top:Flat top/button top
• color: purple
• weight: 25g max
• Standard Charge: 0.5A, 4.20 ± 0.05 V, CCCV 50mA cut-off
• Continuous maximum charge current: 2A
• discharge cut-off voltage: 2.5v
• Continuous maximum discharge current: 10.5A
• Max Discharging Current: 15A
• Operating environment: Charging, 0°C ~ 40°C, Discharging, -20°C~55°C
• Storage environment: -20°C~55°C, storage >3 months: -20°C~45°C

The low capacity 18350 from Vapcell, the do also have a 900mAh version.




I got two different cells, one is flat top, the other is button top, this usual means a small difference at high currents (Button top usual has a slightly bit more resistance).





This does not look good, they do not track, they have both different capacity and resistance and that difference is not due to button/flat top.
One of the cells can handle 10A, the other can only handle 5A and only with difficulties.















Conclusion

The A cell has fairly acceptable performance, but with this much variation between the two cells I will call this cell a bad choice.



Notes and links

The batteries was supplied by Vapcell for review.
I did not mix the 700 and 900 cells, both 900 cells has above 900mAh, there is more about them later.

Note from VapCell: All our 18350 batteries are out of production. Please ignore the specification.

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Comparison to other LiIon batteries

[djozz]

Thanks for this review. I'm about to have more 18350 flashlights, so I''m in for a good cell. I hope Vappower gets this sorted because it looks like they generally make some good batteries.

[windyfire-linda]

@djozz

Thanks for this review. I’m about to have more 18350 flashlights, so I’’m in for a good cell. I hope Vappower gets this sorted because it looks like they generally make some good batteries.

Hi djozz

i am glad see you are interested in 18350 batteries. maybe you can look windyfire 18350 battery .you can see the HKJ rewiew .

Test/Review of Windyfire IMR18350 850mAh (Red)

Windyfire IMR18350 850mAh (Red) [image] Official specifications: Type of Battery: IMR 18350/850mAh Size(mm): 18mm(Diameter) x 35mm(Length) Positive Shape: Button top Weight(g): 22±1g Nominal Voltage: 3.7V Nominal Capacity: 880mah(0.2 C Discharge) Minimum Capacity: 850mah(0.2 C Discharge) Discharge Cut-off voltage: 3 V Standard Charge: 0.4 A /4.2V Maximum charge current: 0.85A Quick Discharge Current: 0.85 A Max Discharge Current: 4 A Initial Impedance : Max:65mOhm Cycle Life: 310times: d…

Test/Review of Windyfire 18350 700mAh (Cyan)

Windyfire 18350 700mAh (Cyan) [image] Official specifications: Nominal capacity: 720mAh Nominal voltage: 3.7V Discharge cut-off voltage: 2.75V Standard charge: 4.2V 500mA Maximum charge current: 1000mA Continuous discharge current: 10A Pulse discharge current: 15A Initial impedance max.: 35mOhm Cycle life: 500cycle to 60% Operating temperature: Charging, 0°C ~ 45°C, Discharging, -20°C~60°C Storage temperature: -20°c -35°c Weight: 20g [image] A high current cell in half the length o…

[TheBo]

@djozz

Thanks for this review. I’m about to have more 18350 flashlights, so I’’m in for a good cell. I hope Vappower gets this sorted because it looks like they generally make some good batteries.

Where did you read Vappower? Vappower has a different line of IMR18350, Im undecided between theirs 18350 https://www.fasttech.com/product/1932600
which are green as all their line

and the AWT which has already been tested by HKJ, the AWT has also a flat top, which i tend to avoid where is possible